|Description||Rick Field, Ph.D.|
Professor, University of Florida
Tevatron Energy Scan: Findings & Surprises
I will present results from the recent CDF study of min-bias collisions (MB) and the "underlying event" (UE) using charged particles produced
in proton-antiproton collisions at 300 GeV, 900 GeV, and 1.96 TeV. The 300 GeV and 900 GeV data are a result of the "Tevatron Energy Scan" which was performed just before the Tevatron was shut down. The direction of the leading charged particle in each event, PTmax, is used to
define three regions of eta-phi space; "toward", "away", and "transverse".
The "transverse" region is further divided into the "transMAX" and
"transMIN" contributions. The "transMIN" region is very sensitive to the
multiple-parton-interaction & beam-beam remnant components of the UE,
while the "transDIF" region ("transMAX" minus "transMIN") is more
sensitive to the initial & final state radiation. The data are corrected to the particle level and are compared with LHC data at 900 GeV and 7 TeV.
This CDF analysis together with LHC UE data provides detailed information about the energy dependence of the various components of
For More information, please contact: Dr. Kenichi Hatakeyama 254-710- 2286